CVE-2026-46331
net/sched: fix pedit partial COW leading to page cache corruption
- Published
- Jun 16, 2026
- Updated
- Sep 15, 2026
- Assigning CNA
- Linux
- Evidence observed
- Aug 6, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 46.3%
- Model date
- Oct 11, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: fix pedit partial COW leading to page cache corruption tcf_pedit_act() computes the COW range for skb_ensure_writable() once before the key loop using tcfp_off_max_hint, but the hint does not account for the runtime header offset added by typed keys. This can leave part of the write region un-COW'd. Fix by moving skb_ensure_writable() inside the per-key loop where the actual write offset is known, and add overflow checking on the offset arithmetic. For negative offsets (e.g. Ethernet header edits at ingress), use skb_cow() to COW the headroom instead. Guard offset_valid() against INT_MIN, where negation is undefined.
Sources
Pedit COW – Linux Kernel Local Privilege Escalation (CVE-2026-46331)
- CVE-2026-46331-pedit-COW-detectionDetection
Defensive validation of CVE-2026-46331 / pedit COW with auditd, AppArmor, mitigation comparison and detection logic.
- page-cache-corruption-lpesExploit
CVE-2026-46331 and CVE-2026-43503
- packet_edit_memeExploit
PACKET_EDIT_MEME.c (aka CVE-2026-46331): yet another page cache poisoning nightmare
pedit COW
- dirtyclone-exploitExploit
CVE-2026-46331 — Linux Kernel Local Privilege Escalation TC pedit + IPsec TEE Page Cache Corruption · Affected kernels: ≤ 6.12.9
- CVE-2026-46331Exploit
CVE-2026-46331 act_pedit page-cache corruption exploit, with Alpine PIE fix
- pedit-cowExploit
Linux kernel privilege escalation exploit for CVE-2026-46331, abusing the traffic control pedit subsystem to corrupt the page cache and execute SUID binaries.
- cve-2026-46331-auditDetection
cve-2026-46331-audit script
- CVE-2026-46331Research
CVE-2026-46331
- CVE-2026-46331-pedit-cowExploit
Write-up and exploitation steps for the pedit COW vulnerability (CVE-2026-46331)
- CVE-2026-46331Exploit
Exploit implementation for CVE-2026-46331 vulnerability, demonstrating exploitation techniques.
- CVE-2026-46331Patch
Chequeo y Fix de la vulnerabilidad "pedit COW"
Responsible use
Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.